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US 2003/0189035 A1Published application
Power supply control circuit and cooking device
AssigneeSharp Kabushiki Kaisha
InventorMasateru Honda
Life of this patent
Estimating the term…
Abstract
In the power supply control circuit, interposed between the power lines 1a and 1b is a serial circuit 21 constructed by connecting in series a radio interference suppression capacitor 2 for suppressing radio interference and a power supply holding switch 4. A node of the radio interference suppression capacitor 2 and the power supply holding switch 4 is connected via an auxiliary power line 1d to a primary side terminal 7a of a stepdown transformer 7, and another primary side terminal 7b of the stepdown transformer 7 is connected to a power line 1b. With the power supply control circuit, reduction of electric power consumption can be realized using a power supply holding switch with a small capacity.
Claims16
A power supply control circuit comprising:
- a control power supply unit to which electric power is supplied from power lines via a starting power supplying switch;
- a controller, to which electric power is supplied from the control power supply unit, for controlling power supply from a power source to a load;
- and
- a serial circuit of a power supply holding switch and a radio interference suppression capacitor, which is connected between the power lines,
- the power supply holding switch being controlled to be in an on-state in response to the power supply to the controller, and maintaining the power supply from the power lines to the control power supply unit until the power supply holding switch is controlled to be in an off-state,
- wherein a node of the power supply holding switch and the radio interference suppression capacitor is connected to a node of the starting power supplying switch and the control power supply unit,
- whereby electric power is supplied to the control power supply unit via the power supply holding switch.
4 more elements
A power supply control circuit comprising:
- a control power supply unit to which electric power is supplied from power lines via a starting power supplying switch;
- a controller, to which electric power is supplied from the control power supply unit, for controlling power supply from a power source to a load;
- and
- a serial circuit of a power supply holding switch and a radio interference suppression capacitor, which is connected between the power lines,
- the power supply holding switch being turned on in response to the power supply from the control power supply unit, and maintaining the power supply from the power lines to the control power supply unit until the power supply holding switch is controlled to be in an off-state by the controller,
- wherein a node of the power supply holding switch and the radio interference suppression capacitor is connected to a node of the starting power supplying switch and the control power supply unit,
- whereby electric power is supplied to the control power supply unit via the power supply holding switch.
4 more elements
A cooking device having a power supply control circuit which comprises:
- a control power supply unit to which electric power is supplied from power lines via a starting power supplying switch;
- a controller, to which electric power is supplied from the control power supply unit, for controlling power supply from a power source to a load which is a high-frequency generating circuit;
- and
- a serial circuit of a power supply holding switch and a radio interference suppression capacitor, which is connected between the power lines,
- the power supply holding switch being controlled to be in an on-state in response to the power supply to the controller, and maintaining the power supply from the power lines to the control power supply unit until the power supply holding switch is controlled to be in an off-state,
- wherein a node of the power supply holding switch and the radio interference suppression capacitor is connected to a node of the starting power supplying switch and the control power supply unit,
- whereby electric power is supplied to the control power supply unit via the power supply holding switch.
4 more elements
A cooking device having a power supply control circuit which comprises:
- a control power supply unit to which electric power is supplied from power lines via a starting power supplying switch;
- a controller, to which electric power is supplied from the control power supply unit, for controlling power supply from a power source to a load which is a high-frequency generating circuit;
- and
- a serial circuit of a power supply holding switch and a radio interference suppression capacitor, which is connected between the power lines,
- the power supply holding switch being turned on in response to the power supply from the control power supply unit, and maintaining the power supply from the power lines to the control power supply unit until the power supply holding switch is controlled to be in an off-state by the controller,
- wherein a node of the power supply holding switch and the radio interference suppression capacitor is connected to a node of the starting power supplying switch and the control power supply unit,
- whereby electric power is supplied to the control power supply unit via the power supply holding switch.
4 more elements
Dependencies are inferred from the claim text.